Monsters are insects insects are monsters look closely

An insect today crawled up my walls.
Such a bizarre little nothing, screaming so loud.
It opened its mouth and out came the pain.
Excruciating venom pouring outrageously insane.

For a moment the insect brought pain to my ears
then I flushed out the words like there´s nobody here
I remembered how little or big one can be
if you only allow it to grow or to shrink.